Automatic cellar-drainer.



L. A. PURSELL.

AUTOMATIC CELLAR .DRAINER.

APPLICATION FILED SEPT. 24. 1914.

1,177,270. Patented Mar. 28,1916. 7'

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@ZZ/YGSfi 1720'072707 %z% WWW *HJ'MMM I UNITED STATES PATENT OFFICE.

LEONARD A. PURSELL, OF DETROIT, MICHIGAN, ASSIGNOR TO IENBERTHY INJECTOR COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

AUTOMATIC CELLAR-DRAINER.

Specification of Letters Patent.

Patented Mar. 28, 1916.

Application filed-September 24, 1914. Serial No. 863,268.

To all whom it may concern:

Be it known that I, LEONARD A. PURsELL, a citizen of the United States, residing at Detroit, county of WVayne, and State of Michigan, have invented certain new and useful Improvements in Automatic Cellar- Draincrs, of which the following is a specification.

My invention more particularly relates to that class of cellar drainers in which an ejector is employed to raise the water from a pit or depression located at the lowest part of the cellar, the ejector. action being obtained by a stream of water under pressure, as for example from the ordinary water service system.

It has been customary in devices of this character to employ a float having a limited range of movement at a suitable distance above the bottom of the pit and controlling a valve which governs the supply of water to the ejector, the latter being either located close to the bottom of the pit or provided with a drain pipe extending near to the bottom of the pit. In such prior art constructions the valve has always been located immediately adjacent the ejector. Where the two are located beneath the float, the important advantage is had over a location above the float that the ejector is filled with the water to be removed from the pit and suction action is dispensed with, thus rendering the ejector more efficient. The objection to such construction, however, has been that the valve and operating mechanism are constantly under water with the result that the parts become corroded, foul and clogged so that sooner or later they cease to operate correctly, This difficulty has been obviated by placing the ejector with its valve above the float so that the operating mechanism never is submerged, but such construction is open to the objection that the drain water must be raised an appreciable distance by suction and where the pressure of the service water is not very great. the action is inefficient or the device altogether inoperative.

My invention in its broader aspect consists in locating the float intermediate the valve controlling the service water and the ejector and arranging the latter to be submerged so that the valve-operating mechanism is not subject to the influence of the water in the pit, but at the same time the ejector has the advantage of operating in the body of water without being required to raise the same by suction. The device is compact so that it may be placed in a pit of small dimensions, is very eflicient under small head of pressure and requires no attent1on or care because the valve connections are not subject to corrosion or clogging.

The accompanying drawing shows the device in side elevation but partly in section upon a central vertical plane to clearly show the inner construction.

The exhaust pipe through which the drain water is to be forced together with the small forcing stream, is shown at 1 and is connected to the ejector 2 by a suitable coupling 3. The nozzle 4 of the ejector is screwed therein at 5 and connected by a union 6 with the supply pipe 7 leading from the control valve 8. The pipe 9 is preferably connected to the water service.

A strainer 10 is composed of an upper and lowersectionjll, 12, 'both of which are provided with annular series of openings 13. The'lower section 12 has an imperforate bottom 14: to prevent the sucking up of material immediately beneath the device where the suction would be unusually powerful and legs 15 which maintain it above the bottom of the pit. The upper section has formed integral therewith a valve chamber 16 which communicates with the ejector through a nipple 17 screwed into said chamber. The sections of the drainer are secured together by a cage 18 having upper and lower screwthreaded extensions 19, 20 which are screwed into the upper and lower sections respectively of the strainer, said extensions being perforated, the upper to form a passage 21 controlled by the foot valve 22 and the lower to form a guide 23 for the valve 7 stem 24.

The connecting pipe 7 between the ejector and the valve casing 8 is of such length as to maintain the valve casing well above the high water level of the pit and a float 25 is guided upon a stem 26 connected to and rising from the ejector. Said'float is connected to and operates the valve 27 on the casing 8, by means of a bell crank lever 28 pivoted at 29 to the valve stem and restrained by a link 30, the long end of said lever having a pin-and-slot connection 31 with links 32 pivoted to the float at 33.

The operation of my device will now be apparent. When the water in the pit reaches the float it will at first raise the same without operating the valve 27 by reason of the lost-motion connection between .the lever and the links, said valve being maintained closed by the water pressure as well as by the Weight of bell crank lever 28 and float 25. As the float continues to rise, however, the pin secured in the lever 28 is forced upward by coming into contact with the bottom of the slot in the link 32 which has the effect of opening the valve 27. As soon .as the latter is withdrawn from its seat the water pressure tends to maintain it open and the full head of pressure is supplied to the ejector nozzle 4. The latter operating in the well known manner forces the water in the pit up through the exhaust pipe 1 which conveys it to waste. As the level of the Water continues to fall the float rides downward on its guide until finally the link 32 under the weight of the float operates the lever 28 to close the valve 27. It will be seen that in my improved construction the ejector can be located as ,near the bottom of the sump or pit as desired and yet the valve and its operating connections-are never submerged so that all the advantage of the ejector operating upon a solid column of water is obtained without subjecting the valve operating parts to submersion whereby they would be corroded I and clogged.

I claim:

1. In a device of the class described, an ejectorfa connection therefrom to service, a valve in said connection located materially above the ejector, an exhaust pipe connected to the ejector and into which the latter discharges, a float mounted above the ejector and connections from the float to the valve adapted to open the latter before the water of pit reaches the level thereof.

2. In a device of the class described, an ejector, a connection therefrom to service, a valve in said connection located materially above the ejector, an exhaust pipe connected to the ejector and into which the latter discharges, a substantially vertical guide extending above the ejector, a float mounted to slide on said guide, and connections from the float to the valve adapted to open the latter before the water of pit reaches the level thereof.

3. In a device of the class described, an ejector, a pipe connecting the nozzle thereof to a service pipe, a valve therein located materially above the level of the ejector, an exhaust pipe connected to the ejector and into which the latter discharges, a suction connection, a chamber and valve therein, a float arranged .above the ejector and connections from the float to the valve whereby the latter is actuated before the water of pit reaches the level thereof.

4. In a device of the class described, an ejector, a pipe for connecting the same to service, a valve located in said pipe materially above the ejector, a guide mounted on said ejector and terminating below the level of said valve, a connection from said float for operating the valve before the level of the water reaches the latter, and an exhaust pipe into which the ejector discharges.

LEONARD A. PURSELL.

Witnesses:

CLARENCE J. Bennie, W. E. MURRAY. 

